Rotary pump.



LH. MYERS.

ROTARY PUMP.

APPLIOATION FILED 1116.20, 191s.

1,093,005. Y. Patented Apr. 14, 1914.

YZ?) 6566' i d l @nu 'f wm conn ist. Manns, or Enmarcar, new Yoan.

ROTRY PUMP.

tocamos..

Specification et Letters Patent.

l Application led August 20, 191.3. Serial No. 785,678.

Patented Aipr. ltd, limiet..

To all 'whom #may concern Be it known that I, JOHN H. MYERS, a .citizen of the United States, residing at Kenmore, in the county of Erie and State of New York, have invented certain'new and useful Improvements in Rotary Pumps, of which the following vis a specification. y

My invention relates to that type of rotary pumps in which a drum is rotatably and eccentrically'mounted within a cylinder and provided with kone or more pistons or wings movable toward and from the inner surface of the wall of thecylinder.

The primary object of my invention is the provision of a pump of this character in which new and improved 'means are employed for forcing the pistons or Wings out wardly by liquid pressure with a View of simplifyingthe constrluction, reducing the ,cost of production and also avoiding noise and undue wear. i

By resorting to the use of liquid pressure for moving the pistons yor Wings outwardly against the wall of the cylinder, the springs or equivalent means commonly employed are dispensed with; and other objects of my invention are the utilization of this principle in such a manner as to' attain quick and positive action of the working pistons or wings;

to improve the construction of the drum with which said pistons or wings are associated; to equip the pump-for high service use; to so construct the pistons or wings that they are quickly moved outwardly aided by centrifugal force and so that the direction of rotation `of the drum will assist in delivering the liquid behind the pistons or Wings and cause their outward movement; and to otherwise improve on pumps ofthis type.

With these and other objects 4in View, my `invention consists in the provision ofl a rota- 'table member or drum having radially vor otherwise movable pistons or wings adapted to travel in contact with the inner surface of the pump cylinder or casing, distributing passages arranged in said rotatable member or drum, a central chamber common to said distributing passages, and a pressure port or ports leading from one or more of the pistons or wings and adapted to bein communication with said central chamber, thuscausing the liquid pressure agent toact against .the pistons or'wingspwithout possibility of the liquid which is being foi-ced through the pump cylinder or casing acting as a mn3 is a detached perspective view tarder to the action of that `partof the liquid used asa pressure agentV Y My invention further consists inlproviding pistons or wings with deep inwardly opening Ypockets so as to render .them heavier at their outer ends, and under the centrifugal force created by the rotation of the drum cause said pistons or Wings to move outwardly more rapidly, similar to an arrow.

It also consists in providing at least one of said pistons or wings with. a pressure port to enable'the liquid pressure agent to enter chambers in rear of said pistons or wings, and it further consists' in the novel construction and arrangement of parts to be hereinafter described and particularly pointedout in the subjoined claims.y

Certain features of the pump illustrated in my copending'application filed March 20, 1912, Serial No. 615,453 are also herein shown, -such features or similar parts, broadly considered, being the distributing ports communicating with the guideways in which the pistons or wings are movable and the depressions in the heads ofthe cylinder.

In the drawings,-Figure 1 is a central transverse section of a pump constructed according to my invention. Fig. 2 is a vertif cal longitudinal section ofthe same taken on a plane indicated by line arf-a, Fig. 1. Fig.

the pistons or wings.

Similar numerals of reference designate similar part-s in the several figures.

. The rotary pump` comprises' acasing 4 which is preferably cylindrical and horizon-l tally-disposed, and has at opposite ends out standing langes 5 and at one side an integral enlargement 6 which serves as a base for theconiplete pump. The casing is pi'ovided at di erentparts of its periphery with a liquid. inlet 7,1a liquid outlet 8, andheads 9, 9, to close opposite ends ofthe cylinder, said heads being provided with alined bearings 10 and depressions 11,'preferably circular, on their inner surfaces. vllhes'e heads are also-provided with Astuiling, bonesV 12. Rotatabl'y mounted in said heads and vassing through said 'stuiiing boxes is a sha t 13 on which is keyed a rotatable drum or member 14, as at l5, 15, said drum or member having a central chamber 16 extending from a point near one en d thereof toa point near the other end. With the shaft 13 extending illimnmlm @05A nnnhmd nknmL,... M..

of one of sov roo

liquid space is provided around said shaft. The rotatable drum or member 14 is mounted eccentrically to the axis of the cylinder and is provided with a plurality of radial guideways 17 which open at the periphery of the drum or member, three of said chambers being preferably employed and a`rranged equi-distant, as shown in the draw ings. By arranging the rotatable drum or member 14 eccentrically within the cylinder, a crescent-shaped liquid space 18 is pro vided between the wall of the cylinder and `said drum or member.

In'each of the guideways a radially movable piston or wing 19 'isprovided, the outer edge or face of which engages with the inner surface of the cylinder or casing. These pistons or wings are hollowed out to provide a comparatively deep pocket 20 in each, and by reason of such arrangement the wings are more readily forced outward by the centrifugal force created when rotating saidl drum or member, this being due to the outer ends of the pistons or wings being heavier than the inner ends and acting simi. lar to an arrow. Connecting the central or annular chamber 1 6 with each ofthe guideways 17 are one or more distributing passages 21 and that by means of these passages and said central or annular chamber said ideways are in intercoinmunication.

The rotatable drum or member 14 travels in the direction of 1, and in the advancing side of one or more of the pistons or wings one or more inlet or pressure ports 22 are formed, said inlet o r pressure ports entering the pockets 20 of the wing or wings in which they are formed. Thus the crescent-shaped chamber 18 is in communication with all of the guideways by reason of the fact that thev several guideways are inter-connected. Each piston or wing Ireciprocates in its guideway as it` sweeps successively in contact with the parts of the wall ofthe cylinder which are near and far from the periphery. of the rotatable drum or member. Each piston or wing passes over the'near side 23 of the cylinder between the liquid outlet and inlet, when in its fully retracted position, but as it passes the inlet it begins to ymove outwardly in its guideway and reaches its point of greatest projection at the far side 24 of the cylinder. Thereafter the piston during its continued forward rotary movement is gradually moved inwardly as it ap roaches the li uid outlet and is in almost i) tracte position by the time it passes the farther side of said liquid outlet. By this means the water is drawn from the inlet into the cylinder or casing and forced through the outlet in a manner well known in this type of pump. 'l each piston or wing is produced by en agement of the outer edge of the same wit the the arrow shown in Fig.

' sages,

ully rehe inward movement o wall of the cylinder, which is eccentric relatively to'the periphery of the rotatable drum or member in which said pistons or wings are arranged.

The pistons or wings are moved automatically outward and move in contact with the wall of the cylinder by pressure of the liquid which is being pumped. his is effected by the liquid passing through the inlet or pressure ports 21 to. the pockets 20 in the pistons or wings and filling the distributing passages 21 and annular chamber 16 between said pockets. the several pistons or wings is subjected to pressure, it exerts pressure against said pistons or wings and against. the wall of the cylinder whether retracted, partly projected, or in their outermost position. By this means the use of springs and equivalent forces are dispensed with and all the advantages of the latter obtained with additional advantages such as result in simplicity of construction, cost of production and wearing qualities.

By reason of the inlet or pressure ports 22 being on the advancing side of one or more of the pistons or wings, constant pressure is assured against the inner ends of the latter due to the tendency of the liquid to liow through said ports and, moreover, this pressure is increased and constant due .to such position of the inlet or pressure ports. In this manner assurance is had that the pistons or wings will at all times be held in contact with thev wall of the cylinderregardless of their position in the rotation of the drum. It is to be noted that the guideways in the rotatable drum or member are ofsuiiicient depth to have their inner ends register with the depressions 11 in the heads of the casin so that communication is also establishe between said depressions, the said pockets in the pistons or wings, the distributing pasand the central or annular chamber between said distributing passages.

` When using the pump itis easily primed by means of a feed cup 25 and pipe 26, said pipe leading to the depression of one 4of said heads of the casing, and as this depr'es sionl is in direct communication with the guideways and the latter in communication with the distributing passages and the central or annular' chamber connectin thev latter, the pump may be easily lled with water to force the pistons or wings into contact with the wall of the cylinder preparatory to starting the pump into action.

lVhen using the pump for high service purposes a bleeder 27 1s employed which comprises an outlet pipe 28 having a suitable regulating valve 29'therein so that the desired quantity of liquid may be allowed to ow through said pipe.

In the drawings l have shown only one of the pistons or wings provided with the inlet holds them positivelyA or pressure ports although I deem itfully within the spirit of my invention to employ such an opening or openings in additionalpistons or wings. However, when only one piston or wing is provided with inlet openings or ports the' piston or wingthus rovided is not projected suiiiciently far W en passing the inlet or outlet to open said openings, which'is a very desirable feature, ow

ing to the fact that at such times it is of advantage to prevent any pressure against the water within the pockets of the valves or blades and the spaces communicating'v therewith.

'Having thus described my invention, what I claim is,-

1. A rotary pump comprlslng a casing having an inlet and an outlet spaced apart, a rotatable member therein having a pluralityof guideways and means for connectv-ing the inner ends of said guideways, a

piston or wing movable inwardly or outwardly in each of said guideways, and a pressure port .in one of said pistons or wings leading behind the latter.

2. A rotary pump comprisin a casing having an inlet and an outIet spaced apart, a rotatable member therein having a guideway, a piston or wing movable inwardly and outwardly in Said guideway, and a pressure port opening into said piston or wing at the advancing side thereof.

3. A rotary pump comprising a. c linder having an inlet and an outlet space apart,

a rotatable member eccentrically 'arrangedV within said cylinder and having- .aplurality of guideways and passages interconnecting said guideways, a piston or wing provided with van inwardly-opening pocket fitting into each of said guideways, and a pressure port extending from the side face of one ofjsaid pistons or wings to said pocket. j l

4. A rotary pum comprising a casing having heads provi ed with depressions on their inner faces, a Vrotatable member 'eccenf trically mounted in said casing and having4 aV plurality of guideways extending in! wardly from its periphery and being in communication with the depressions in said depressions, and a piston or wing movableV inwardly and outwardly in each of said guideways, one of said istons having an inlet or pressure port leading to its coperating guideway. i

5. A rotary pump comprising a casing having an inlet `and an outlet spaced apart, a rotatable member eccentrically mounted within said casing and having a central chamber,a plurality of guideways extending inwardly from its periphery and distributing means connecting said central chamber with said guideways, a piston or wingin each of said guideways constructed with its outer end heavier than its inner, and a pressure port or ports in one of said pistons or wings in communication with said distributing means.l y

6. A rotary pump comprisin a cylinder having heads, a shaft journ'a ed in said heads, a drum secured to said shaft andY having a hollow central chamber through which said shaft extends to provide an annular space around the latter, said hav-v Ving also guideways extendin inwardly from its periphery and distributing passages connecting said annular space with said guideways, a piston or wing in each of said guideways, one of said pistons or wingsl having a pressure port extending inwardly from theadvancing side thereof and being in communication with said distributing passages and annular space.

7. A rotary pump comprising a casing, a drum rotatable in said casing and having guideways and means of intercommunication between said guideways, and a piston in each of said guideways,' one of said pistons having a pressure port extending inwardly from its advancing side and being in communication with said guideways.

In testimony whereof I ax my signature in presence of two witnesses.

Witnesses:

EMIL. NEUHART, JACOB OBERs'r, Jr. 

